"We lost every single one of our belongings with no insurance, but we all made it to land alive & we are not giving up on our dreams!," Ms Walsh wrote.

They set sail last Tuesday from Tarpon Springs, heading towards Key West in the state's far south. However, on Wednesday night - after only one full day at sea - their boat capsized near Madeira Beach.

Mr Broadwell and Ms Walsh say they grabbed what they could before escaping.

The couple, who previously worked in Philadelphia and Colorado, spent two years planning their boat trip.

Mr Broadwell says he worked extra hours as a minicab driver in order to be able to afford it.